BARBARAELLEN KOCH FILE PHOTO | The trailer for homeless sex offenders on the Suffolk County jail property in Riverside.

A sex offender who had been living at the county’s trailer for homeless sex offenders in Riverside was arrested for failing to register a new address with state authorities, Southampton Town police said.

CHARLES JOHNSON

Charles Johnson, 45, was arrested Feb. 28, weeks after he vacated the Department of Social Services-run shelter parked outside the county jail, town police said.

“Approximately two months ago, based on thorough record-keeping and periodic address checks,” an investigation found he had moved to a new location, according to a police press release issued Monday.

But he did so without alerting the state Division of Criminal Justice Services within 10 days of moving, police said.

BARBARAELLEN KOCH FILE PHOTO | The trailer for homeless sex offenders on the Suffolk County jail property in Riverside.

A 53-year-old man who was supposed to be living in the sex offender trailer at the Riverside jail was busted in Babylon Town for not registering his new address, officials said.

CARL GRAVES

Carl Graves, who lives in the Department of Social Services’ homeless sex offender trailer in the jail parking lot, was initially arrested by Amityville Village police for drinking in public and they discovered he was wanted by Southampton Town Police for failing to register as a sex offender, according to local police, who said he had failed to report to the trailer since July 16.

He was charged with violating the state sex offender registration act on Dec. 31.

Mr. Graves is considered a Level 2 sex offender on a spectrum in which Level 3 offenders are deemed the most likely to re-offend.

He was convicted of second-degree rape in 2003 in Suffolk County Police jurisdiction, and the victim was a 14-year-old girl, according to the state sex offender registry .